Stablecoin project Origin Dollar (OUSD) sustained a re-entrancy attack at 00:47 UTC Tuesday resulting in a loss of funds worth $7 million, including over $1 million deposited by Origin and its founders and employees.
The team has disabled deposits and the price of the project's native token is down 85% since the attack, according to CoinGecko.
Tuesday's attack utilized a flash loan and flaws in OUSD contracts to initiate what is known as a "rebase," according to Etherscan and an updated blog from the team. The attack artificially inflated the supply of OUSD tokens within the protocol before swapping the newly printed tokens on SushiSwap and Uniswap for USDT, the blog states.
Origin wrote in an update:
Early reports indicated Origin Protocol had suffered a $3.5 million flash loan attack or pricing oracle attack. Although the attacker employed a flash loan, Origin has not cited oracle manipulation as the technical culprit.
"This has been a rough day for everyone involved, but we're not going anywhere. We're still here and will be working to rebuild," Origin Protocol co-founder Josh Fraser told CoinDesk in an email at 06:16 UTC, adding:
UPDATE (Nov. 17, 05:53 UTC): Adds Origin's confirmation of the attack, an updated figure and information on the attacker's technique.
UPDATE (Nov. 17, 06:22 UTC): Adds comment from Origin co-founder Josh Fraser.
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